Packet duplication carrier enhancements

1. A method for wireless communications by a user equipment (UE), comprising:

receiving an uplink packet duplication configuration that indicates a plurality of configured component carriers and a number of copies of an uplink packet to transmit on one or more of the plurality of configured component carriers;

receiving downlink control information signaling that indicates a selection criterion:

selecting a subset of the plurality of configured component carriers based at least in part on the selection criterion and the number of copies of the uplink packet to transmit; and

transmitting an uplink packet transmission comprising a copy of the uplink packet on each component carrier of the subset of the plurality of configured component carriers based at least in part on the uplink packet duplication configuration.

2. The method of claim 1 , further comprising:

receiving control signaling that indicates a periodic grant for uplink transmission, wherein the uplink packet transmission comprising the copy of the uplink packet is transmitted on a component carrier of the subset of the plurality of configured component carriers based at least in part on the periodic grant.

3. The method of claim 1 , further comprising:

receiving downlink control information that indicates a grant for uplink transmission, wherein the uplink packet transmission comprising the copy of the uplink packet is transmitted on a component carrier of the subset of the plurality of configured component carriers based at least in part on the grant.

4. The method of claim 1 , wherein selecting the subset of the plurality of configured component carriers comprises:

selecting the subset of the plurality of configured component carriers based at least in part on a result of a clear channel assessment procedure performed on at least one component carrier of the plurality of configured component carriers, wherein the selection criterion is based at least in part on the result of the clear channel assessment procedure indicating component carrier availability.

5. The method of claim 1 , wherein selecting the subset of the plurality of configured component carriers comprises:

determining not to transmit the copy of the uplink packet on a first component carrier of the plurality of configured component carriers based at least on part on determining that a number of transmissions of the copy of the uplink packet satisfies the number of copies of the uplink packet to transmit.

6. The method of claim 1 , wherein selecting the subset of the plurality of configured component carriers comprises:

determining not to transmit the copy of the uplink packet on any component carrier of the plurality of configured component carriers having a signal strength measurement that does not satisfy a threshold.

7. The method of claim 1 , wherein selecting the subset of the plurality of configured component carriers comprises:

selecting the subset of the plurality of configured component carriers based at least in part on a signal strength metric generated for a component carrier of the plurality of configured component carriers, wherein the signal strength metric is a reference signal received power metric, a reference signal metric, a channel quality metric, a signal to interference plus noise ratio metric, signal to noise ratio metric, a rank metric, or any combination thereof.

8. The method of claim 7 , wherein the selection criterion is based at least in part on comparing the signal strength metric to a signal strength threshold.

9. The method of claim 1 , wherein selecting the subset of the plurality of configured component carriers comprises:

generating one or more signal strength measurements for one or more of the plurality of configured component carriers;

ordering the plurality of configured component carriers based at least in part on the one or more signal strength measurements; and

selecting the subset of the plurality of configured component carriers based at least in part on the ordering and the number of copies of the uplink packet to transmit.

10. The method of claim 9 , wherein a signal strength measurement for each component carrier of the subset of the plurality of configured component carriers satisfies a signal strength threshold indicated in the selection criterion.

11. The method of claim 9 , wherein a signal strength measurement for at least one component carrier of the subset of the plurality of configured component carriers satisfies a signal strength threshold indicated in the selection criterion.

12. The method of claim 9 , wherein generating the one or more signal strength measurements comprises:

generating a signal strength measurement for a downlink beam.

13. The method of claim 1 , wherein selecting the subset of the plurality of configured component carriers comprises:

selecting the subset of the plurality of configured component carriers based at least in part on an exposure metric determined for transmissions on the subset of the plurality of configured component carriers, wherein the selection criterion is based at least in part on a comparison of the exposure metric to a permissible exposure threshold; and

determining to transmit on one or more of the plurality of configured component carriers based at least in part on detecting the exposure metric crossing the permissible exposure threshold.

14. The method of claim 1 , wherein selecting the subset of the plurality of configured component carriers comprises:

determining a number of component carriers to include in the subset based at least in part on detecting exposure crossing an exposure threshold.

15. The method of claim 1 , wherein the uplink packet duplication configuration indicates the selection criterion, and wherein the uplink packet duplication configuration is an uplink packet data convergence protocol duplication configuration.

16. The method of claim 1 , wherein the uplink packet transmission is an initial transmission of the uplink packet or a retransmission of the uplink packet.

17. The method of claim 1 , wherein the number of copies of the uplink packet is one of a minimum or maximum number of copies of the uplink packet to transmit.

18. The method of claim 1 , wherein selecting the subset of the plurality of configured component carriers comprises:

selecting the subset of the plurality of configured component carriers based at least in part on one or more of a number of Hybrid automatic repeat request (HARQ) retransmissions of the copy of the uplink packet or a number of HARQ retransmissions of a copy of a previous uplink packet.

19. A method for wireless communications by a network device, comprising:

transmitting an uplink packet duplication configuration that indicates a plurality of configured component carriers and a number of copies of an uplink packet to transmit on one or more of the plurality of configured component carriers;

selecting a subset of the plurality of configured component carriers based at least in part on a selection criterion and the number of copies of the uplink packet to transmit;

transmitting downlink control information signaling that indicates the selection criterion; and

monitoring for an uplink packet transmission comprising a copy of the uplink packet via at least one component carrier of the subset of the plurality of configured component carriers based at least in part on the uplink packet duplication configuration.

20. The method of claim 19 , further comprising:

receiving the uplink packet transmission comprising the copy of the uplink packet via a component carrier of the subset of the plurality of configured component carriers.

21. The method of claim 19 , further comprising:

transmitting control signaling that indicates a periodic grant for uplink transmission for transmitting the uplink packet transmission comprising the copy of the uplink packet on a component carrier of the subset of the plurality of configured component carriers.

22. The method of claim 19 , further comprising:

transmitting downlink control information that indicates a grant for uplink transmission for transmitting the uplink packet transmission comprising the copy of the uplink packet on a component carrier of the subset of the plurality of configured component carriers.

23. The method of claim 19 , wherein monitoring for the uplink packet transmission comprises:

determining not to monitor for the copy of the uplink packet on a first component carrier of the plurality of configured component carriers based at least on part on determining that a number of transmissions of the copy of the uplink packet satisfies the number of copies of the uplink packet to transmit.

24. The method of claim 19 , wherein monitoring for the uplink packet transmission comprises:

determining not to monitor for the copy of the uplink packet on any component carrier of the plurality of configured component carriers having a signal strength measurement that does not satisfy a threshold.

25. The method of claim 19 , wherein monitoring for the uplink packet transmission comprises:

monitoring a shared radio frequency band for the uplink packet transmission comprising the copy of the uplink packet on a component carrier of the subset of the plurality of configured component carriers.

26. The method of claim 19 , wherein monitoring for the uplink packet transmission comprises:

monitoring a frequency range 2 (FR2) frequency band for the uplink packet transmission comprising the copy of the uplink packet on a component carrier of the subset of the plurality of configured component carriers.

27. An apparatus for wireless communications, comprising:

a processor, memory coupled with the processor; and

instructions stored in the memory and executable by the processor to cause the apparatus to:

receive an uplink packet duplication configuration that indicates a plurality of configured component carriers and a number of copies of an uplink packet to transmit on one or more of the plurality of configured component carriers;

receive downlink control information signaling that indicates a selection criterion;

select a subset of the plurality of configured component carriers based at least in part on the selection criterion and the number of copies of the uplink packet to transmit; and

transmit an uplink packet transmission comprising a copy of the uplink packet on each component carrier of the subset of the plurality of configured component carriers based at least in part on the uplink packet duplication configuration.

28. An apparatus for wireless communications, comprising:

a processor,

memory coupled with the processor; and

instructions stored in the memory and executable by the processor to cause the apparatus to:

transmit an uplink packet duplication configuration that indicates a plurality of configured component carriers and a number of copies of an uplink packet to transmit on one or more of the plurality of configured component carriers;

select a subset of the plurality of configured component carriers based at least in part on a selection criterion and the number of copies of the uplink packet to transmit;

transmit downlink control information signaling that indicates the selection criterion; and

monitor for an uplink packet transmission comprising a copy of the uplink packet via at least one component carrier of the subset of the plurality of configured component carriers based at least in part on the uplink packet duplication configuration.